Metal-cutting tool



G.'PENDLETON.

METAL CUTTING TOOL.

AFPLICATION FILED-FEB. 27, 1920.

Patented Oct. 26, 1920.

UNIT@ STTES Parent orties.

GURDON PENDLETON, OF NORTH ,ATTLEBORQ IVLASSCHUSET'JS.nl

METAL-CUTTING- TOOL.

Specification of Letters Patent.

Patented Oct. 26, 1920.

Application filed February 27, 1920. Serial No. 361,881. f

tools for cutting metal and more particu-A larly to the class of tools known as band iron cutters.

The objecty of the invention is to provide a powerful hand tool for removing bands of metal from around bales of cotton, packing cases andthe like where the said bands very closely engage the bales or cases and because of said close engagement are very difficult to sever. ,Y

It is an object therefore, of the invention to so construct and arrange the cutting instrumentalities of the tool and connect the same to the operating handles that with the initial movement of the handles the movable members of the cutting instrumentalities will first be forced beneath the edges of the band of metal and if there is a solid backing as, for example, in packing cases or boxes, said band will be forced away from the case as the handles are forced together, a, curved end portion of the movable cutting members constituting a fulcrum to pry said band awayfrom said case or in the event that the backing yields, as would be the case in al bale of cotton, the said movable members will be forced beneath the band, the said band in each instance being then forced against a stationary cutter with which the movable members finally coperate to sever the band. K

It is also an object of the invention to inf crease the power applied by the handles to the movable cutting members by employing a triple toggle mechanism in connecting said handles and the movable cutting members together.

The invention consists in the combination and arrangement of parts set forth in the following specilication and particularly pointed out in the claims thereof.

Referring to the drawings Figure 1 represents a.y plan view of a.v metal cutting tool embodying my invention,r the cover plate thereof being partly broken, away, thetool being illustrated in its open position and in engagement with a bale of cotton or the like. o

Fig. 2 represents an end elevation of the metal cutting tool. 'f

Fig. 3 is a' plan view similar to Fig. 1 but illustrating thetool inits closed position,y

and in engagement with the side of a packs mg case. n

F ig. 4 isa side elevation with the various parts occupying the same positions as illus` trated in Fig. 3.

Like numerals refer to like parts throughy out the several views of the drawings.

In the drawings: l represents a frame to which is secured by means of bolts 2 a reversible stationary cutter 3 provided with a pair of concave cutting edges 4 and 5 upon opposite ends thereof. y Pivoted'upon the bolts 2 with their sides contacting 'with the side of the stationary cutter 3 are a pair of movable cutting members 16; The movable cutting members 6 each have a V-shaped notch 7 in their opposite adjacent edges,

one side of saidV-shaped notch constituting a cutting edge 8. The i movable cutting" members 6 are also provided with a curved outer end 9 which intersects the cutting edge Sand forms a'pointed extremity 10. When the movablev cutting members are rocked upon their pivots 2,-the pointed eX- tremities 10 are forcedbetween the under surface of a sheet metal band A and the outer surface of a ele B or packing case C around which said band may extend.

Then a metal band is being `removed from a case C `which provides a solidfbacking, as illustrated in Fig. 3, the curved edge 9 sov constitutes a fulcrum and as the movable,

cutting members are rocked upon their pivots 2 they will also rock upon the fulcrum and force the band A1 away fromthe case.

The movable cutting members 6 are each rocked in unison upon their pivots 2 by a link 11,'one end of which is pivotally attached to said movable cutting members by a stud 12 and the other end is pivotally ats tached by a stud 13 to a slide 14. The links 11 and slide lll cooperate with each other to form a toggle mechanism 15. The slide 14 `is adapted to reciprocate in a groove 16 provided in the frame l, motion being imparted thereto by means of a pair of bell crank levers 17 which are pivotally attached to the'frame 1 by bolts 18. The bell-crank mechanism 241. rlhel movement of the slide 1 14 in each direction is limited by pla-tes 25 and 26 which are located within the groove 16 at each end thereof, the opposite ends of the slide lll abutting thereagainst.

A cover plate 27 is located above the movable cutting members 6,- links 11 and 21 and ends 2O of the bell-crank levers and is held in place bythe bolts 2 and 18. The cover plate 27, not only acts to stabilize each of the toggle mechanisms and hold the slide 14 in the bottom of the groove 16 but the forward edge constitutes a rest 28 against which the metal band A is supported upon the oppositeside laterally of the movable cutting members 6 from the stationary cutter 3, while said band is being severed as illustrated in Fig. 1.

The operation of my improved metal cutting tool is as follows: Y

Vhen it is desired to sever a metal band in vorder that the same may be removed from around a bale of cotton or the like to which it is very closely attached, the handles 19 of the tool are grasped and separated, thereby simultaneously separating the orner ends of the movable cutting members 6. The tool is then placed against the bale as illustrated in Fig. 1 and the handles 19 moved together, enough pressure being simultaneously placed longitudinally of the tool to cause the points 10 of the movable cutting members to pass behind the band A as said points approach each other. As the handles 19 are forced together, the two toggle mechanisms 24 simultaneously force the slide 111 longitudinally of the slot 16 toward the outer end of the tool thereby causing the toggle mechanism 15 to force the innerend of each of the movable cutting `members 6 4 #'1 outwardly. This movement will simultaneously force each of the pointed ends 10 beneath the metal band A and then force said band against the stationary cutter 8.' i further movement of the handles 19 toward each other will result in severing the band.

The cutting edges 8 of each movable cutting member 6 coperate with the stationary cutter 3 to sever said band from the 0pposite edges thereof inwardly. The stationary cutter 3 has a concave cutting edge and because of this fact, less power is requiredA to sever the metal and the portion of the metal adjacent to the severed end is not as badly distorted as is the case where the cutting edge is straight. Wfhere the tool is used to sever a metal band which is extending around a packing case the points 10 are forced beneath the opposite edges of the band and as the movable cutting members 6 are rocked upon their pivots 2 the curved edge portion 9 of said members will engage the packing case as illustrated in Fig. 3 and act as a fulcrum to pry the metal band away from the case as the points are forced togethen During the severing operation, the rest 28 will engage the metal band and act as a support for said band upon the opposite side of the movable cutting member 6 from the stationary cutter 3.

llVhen the cutting edge 4. of the stationary cutter becomes dull or has been ground away too far to be of further use the said stationary cutter may be reversed and the cutting edge 5 utilized. The under surface of the cover plate 27 contacts with the upper surface of the links 11 and 21 and acts to stabilize the toggle mechanisms of which said links constitute a part, and tends to hold the slide le in its proper position in the Vgroove 16. rThe arrangement of the toggle mechanisms greatly increases the power applied by the handles to force the movable cutting members.

Having thus described my invention what I claim and desire by Letters Patent to secure is:

1. A metal cutting tool of thercharacter described having, in combination, a stationary cutter, a plurality of movable cutting members each embodying therein a pointed outer extremity, and means to force said pointed extremities between a band of sheet material and a bale or the like around ,which said band extends and thereafter force said band into cutting engagement with said stationary cutter.

2. A metal cutting tool of the character described having, in combination, a stationary cutter, a 4plurality of movable cutting members each embodying therein a pointedV outer extremity, and means to simultane-V ously force said pointed extremities beneath the opposite edges of a band of sheet mateterial and between said band and a bale er the like around which said band extends and thereafter force said band into cutting engagement with said stationary cutter.

3. A metal cutting tool of the character described having, in combination, a reversible stationary cutter provided with a eencave cutting edge, a plurality of movable cutting members each embodying therein a pointed outer extremity, and means to simultaneously force said pointed extremities beneath the opposite edges of Aa band of sheet material and between said band and a case or the likearound which said band eX- tends and `thereby simultaneously force said band away from said case and into cutting engagement with said stationary cutter.

4. A metal cutting tool of the character described having, in combination, a stationary cutter, a plurality of movable cutting members each embodying therein -a pointed outer extremityL and a portion adjacent thereto constituting a fulcrum, 'and means to simultaneously force said pointed Lextremities between a band of sheet material and a case or the like around which said band extends, and rock said movable cutting member upon said fulcrum and thereby force said band away from said case and into cutting engagement with said stationary cutter.

5. A metal cutting tool of the character described'having, incombination, a reversible stationary cutter, a plurality of movable cutting members each embodying therein a wedge-shaped outer extremity, and means to force said wedge-shaped extremity between a band of sheet metal and a bale or the like around which said band extends and thereafter force said band into cutting engagement with said stationary cutter.

6. A metal cutting tool of the character described having, in combination, a stationary cutter, a plurality of movable cutting members each embodying therein a wedgeshaped outer extremity, and means to force said wedge-shaped extremity between ak band of sheet metal and a bale or the like around which said band extends and thereafter force said band into cutting engagement with said stationary cutter, and sever said band from the opposite edges thereof inwardly.

7. A metal cutting tool of the character described having, in combination, a stationary cutter provided with a concave cutting edge, a pair of movable cutting members each provided with a cutting edge, and means to force each of said movable cutting members into engagement with a band of sheet material and force said band into cutting engagement with said stationary cutter and thereby sever said band from the opposite edges thereof inwardly.

8. A metal cutting tool of the character' described, having, in combination, a stationary cutter, a plurality of movable cutting members each embodying therein a wedgeshaped outer extremity, and means to force said wedge-shaped extremity between a band of sheet metal and a bale or the like around which said band extends and thereafter force said band into cutting engagement with said stationary cutter to sever said band from the opposite edges thereof inwardly, and means located upon the opposite side laterally of said movable cutting member from said stationary cutter adapted to engage said band during the severing operation and provide a rest therefor.

9. A metal cutting tool of the character described having, in combination, a stationary cutter, a plurality of movable cutting members, and means to force said movable cutting members intocoperating relation with said stationary cutterto sever material inserted therebetween, said means embodying therein'a triple toggle movement.

l0. A metal cutting tool of the character described'having, in combination, a stationary cutter, a plurality of movable cutting members, a pair of operating handles, a toggle mechanism adapted to simultaneously move each of said movable cutting members into cooperating relation with said stationary cutter and sever material inserted therebetween, and a pair of other toggle mechanisms adapted to operate said first mentioned toggle mechanism, each of said last mentioned toggle mechanisms being connected to' and operated by one of said handles. y

1l. A metal cutting tool of the character described having, in combination, a frame, a stationary cutter attached to said frame, a plurality lof movable cutting members pivotally mounted upon said frame each provided with av cutting edge, and means to force each of said movable cutting members into engagement with a band of sheet material and force said band into cutting engagement with said stationary cutter and therebysever said band from the opposite edges thereof inwardly.

l2. A metal cutting tool of the character described having, in combination, a frame, a stationary cutter attached to said frame, a plurality of movablev cutting members pivotally mounted upon said frame, each embodying therein a pointed outer extremity and a portion adjacent thereto constituting a fulcrum, a pair of bell-crank levers, a toggle mechanism adapted to simultaneously move each of said movable cutting membersinto cooperating relation with said stationary cutter to sever material inserted therebetween, and means to connect said toggle mechanism with each of said bellcrank levers.

13. A metal cutting tool of the character described having, in combination, a frame,

a stationary cutter attached to said frame, Y

bodying therein a slide and a pair of links connecting said slide with said movable cutting members, and a second pair of links connecting said toggle with said bell-crank levers.

14. A metal cutting tool of the character described having, in combination, a frame, a stationary cutter attached to said frame, a plurality of movable cutting members pivotally mounted upon said frame, each embodying therein a pointed outer eXtremity and a portion adjacent thereto constituting a fulcrum, a pair of bell-crank levers, a toggle mechanism adapted to simultaneously move each of said movable cutting members into cooperating relation with said stationary cutter to sever material inserted therebetween, said toggle mechanism embodying therein a slide and a pair of links connecting said slide with said movable cutting members, and a second pair of links connecting said toggle mechanism with said. bell-crank levers, each of said last mentioned links cooperating with one of said bell-crank levers to form other toggle mechanisms.

15. A metal cutting tool of the character described having, in combination, a frame, a reversible stationary cutter provided with a plurality oi independent concave cutting edges, a. plurality of movable cutting members mounted upon said frame, veach emi Said bell-crank levers to v:form other toggle mechanisms, and aplate against which said band is adapted to rest upon the opposite side laterally of said movable cutting members from said stationary cutter.

In testimony whereof I have hereunto set my hand in presence ot' two subscribing witnesses. i

Y A GURDON PENDLETON.

Vlitnesses i HAROLD lll. MASON, Roer. R. PnNDLnToN. 

